Bookmarks not shared

[#1]

I have Adobe Acrobat Reader DC on my Android tablet and if I add bookmarks to a pdf file and then share it to myself via gmail to put the file on my android phone which also has Adobe installed, the file attachent when downloaded does not have the bookmarks. Is this a known issue? Any advice please will be appreciated

[#2]

I have Adobe Acrobat Reader DC on my Android tablet and if I add bookmarks to a pdf file and then share it to myself via gmail to put the file on my android phone which also has Adobe installed, the file attachent when downloaded does not have the bookmarks. Is this a known issue? Any advice please will be appreciated